Lamp



FIG. 1 is a perspective view of a lamp showing my new design;

FIG. 2 is a side elevational view thereof on an enlarged scale;

FIG. 3 is a top plan view thereof on an enlarged scale;

FIG. 4 is a side elevational view on an enlarged scale as seen from the right of FIG. 2. 

The ornamental design for a lamp, as shown and described. 